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- // SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
- // SPDX-License-Identifier: MIT
- package sctp
- const (
- paddingMultiple = 4
- )
- func getPadding(l int) int {
- return (paddingMultiple - (l % paddingMultiple)) % paddingMultiple
- }
- func padByte(in []byte, cnt int) []byte {
- if cnt < 0 {
- cnt = 0
- }
- padding := make([]byte, cnt)
- return append(in, padding...)
- }
- // Serial Number Arithmetic (RFC 1982)
- func sna32LT(i1, i2 uint32) bool {
- return (i1 < i2 && i2-i1 < 1<<31) || (i1 > i2 && i1-i2 > 1<<31)
- }
- func sna32LTE(i1, i2 uint32) bool {
- return i1 == i2 || sna32LT(i1, i2)
- }
- func sna32GT(i1, i2 uint32) bool {
- return (i1 < i2 && (i2-i1) >= 1<<31) || (i1 > i2 && (i1-i2) <= 1<<31)
- }
- func sna32GTE(i1, i2 uint32) bool {
- return i1 == i2 || sna32GT(i1, i2)
- }
- func sna32EQ(i1, i2 uint32) bool {
- return i1 == i2
- }
- func sna16LT(i1, i2 uint16) bool {
- return (i1 < i2 && (i2-i1) < 1<<15) || (i1 > i2 && (i1-i2) > 1<<15)
- }
- func sna16LTE(i1, i2 uint16) bool {
- return i1 == i2 || sna16LT(i1, i2)
- }
- func sna16GT(i1, i2 uint16) bool {
- return (i1 < i2 && (i2-i1) >= 1<<15) || (i1 > i2 && (i1-i2) <= 1<<15)
- }
- func sna16GTE(i1, i2 uint16) bool {
- return i1 == i2 || sna16GT(i1, i2)
- }
- func sna16EQ(i1, i2 uint16) bool {
- return i1 == i2
- }
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